"This," replied Barbicane, "is, I believe, the maximum velocity ever attained?"
"It is so," replied the general.
"Ah!" groaned J. T. Maston, "if my mortar had not burst----"
"Yes," quietly replied Barbicane, "but it did burst. We must take, then, for our starting point, this velocity of 800 yards. We must increase it twenty-fold. Now, reserving for another discussion the means of producing this velocity, I will call your attention to the dimensions which it will be proper to assign to the shot. You understand that we have nothing to do here with projectiles weighing at most but half a ton."
"Why not?" demanded the major.
"Because the shot," quickly replied J. T. Maston, "must be big enough to attract the attention of the inhabitants of the moon, if there are any?"
"Yes," replied Barb
